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14-1 ԧ [ ] Aԧҧ Bԧҧ C D 14-2 m S

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2


1





14-3 1.0010 kg 500ms 4.99kg 8.00103Nm 1 x



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2







14-4 4.010 m 0.5Hz t = 0 A/2 է

14-5 T x ˡ[ ] AT/4 BT/12 CT/6 DT/8 14-6 [ ] A/6 B5/6 C-5/6 D-/6 E-2/3 14-7 ԧ[ ] A x = 2 cos(

2t 2 + ) cm 3 3 2t 2 B x = 2 cos( ? ) cm 3 3 4t 2 C x = 2 cos( + ) cm 3 3 4t 2 D x = 2 cos( ? ) cm 3 3 4t E x = 2 cos( ? ) cm 3 4
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14-8 x 0.06m 2.0s t = 0 0.03m x t = 0.5s x = -0.03m x

14-9 t=0 T A (a)(b)(c) x x (a) (b) (c)
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v0 (a) v0 (b) v0=0 (c)











14-10 0.01m x

14-11 E1 E1 [ ] AE1/4 BE1/2 C2E1 D4E1

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15-1 y = A cos(bt ? dx ) bd u = = 15-2 2s 0.06mt = 0 u = 2m/s x Ԩ

=

15-3 h A A u B 8m 5m 9m C D x C D C B A D

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15-4 u = 0.50m?s 1 x t = 2s


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15-5 12m x x = 1.0m

x t = t0 15-1 15-6 A x = 0 [ ] Ay = Acos[2 (t + t0) +/2] By = Acos[2 (t - t0) +/2] Cy = Acos[2 (t - t0) -/2] Dy = Acos[2 (t - t0) +]

(a)

(b) 15-1 15-2 15-7 x x1 x2 15-2 (a)(b) x2x1 x2 - x1 x2 x1
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15-8 t = 0 250Hz P 7.5m t = 0

15-9 AB =30Hz u = 0.50m? s 1 P Ӧ 3m

P

30 A 0.07m B

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15-10 PQ PQ = 3 /2R PQ PQ R R

P 3 /2

Q

R

15-11 P S1 S2 3 10 /3 ӧ P

S1 3 P S2 10 /3

15-12 ˧ AB 100HzB A ˧ AB 30.0m 400 m? s 1 AB ˨

A 30m

B x

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15-13 S1 S2 P ӧ S1 P = 2 S 2 P = 2.2 P S1 y1 = A cos( 2 t + A y 2 = A cos( 2 t ?

1 ) S2 [ 2
S1

]

1 ) 2

B y 2 = A cos(2 t ? ) C y 2 = A cos( 2 t +

P

1 ) 2
S2
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D y 2 = 2 A cos(2 t ? 0.1)









15-14 [ ] A B C D 15-15 ab [ ] B /2 C5 /4 D0 A 15-16 y = 2.010 2cos15xcos1500t (SI)






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17-1 17-2 n A B A B 3 AB [ ] A1.5 B1.5n C3 D1.5 /n S1 17-3 e S O S2 n S1 O SS1 = SS 2

17-4 1.40 1.70 = 480nm d d

17-5 d = 400nm n2 = 1.40 n1n2n3

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17-6 d = 350nm n2n1n2n3

17-7 0.50 ? m 1.50 400nm760nm

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17-8 a A B è = 500nm b [ ] A 500nm B 250nm C 500nm D 250nm 17-9 [ ] A B C D E n1 n2 17-10 n3 n1n2n3 2 e = 17-11 n2 n1n2n3n2 2 e= 17-12 Lަ L L [ ] A B C D 17-13 3.010 2m = 589.3nm 17 30 20 n1 n3 n2



L

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17-14 ħ 589.3nm r=4.010 3m r =3.8510 3m

17-15 =4 ? =30 17-16 1 3 P
2 1 3 P

5

f

P 17-17 = 550nm d = 210 4cm [ ] A2 B3 C4 D5 17-18 b = 0.40mm = 589nm f = 1.0m n i = 30ҧܦ

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17-19 ֛ O P P P

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17-20 ç [ ] A B C D 17-21 1 2 ۨ 1 2 30 1 = 500nm 2

17-22 n1 n2

17-23 60 I0 [ ] B3 I0/8 CI0/4 D3 I0/4 AI0/8 17-24 1 = 30 2 = 60

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17-25 5

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18-1 a S xoy xy S 0.8cc S x S [ ] 2 Aa B0.6a2 C0.8a2 Da2/0.6 18-2 [ ] A B C D 18-3 a b m0 m0/ab v [ ] A

m0 1 ? (v / c ) 2 ab

B

m0 ab 1 ? (v / c) 2

C

m0 ab[1 ? (v / c) 2 ]

D

m0 ab[1 ? (v / c) 2 ]3 / 2

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